<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>文档标题</title>
    <script>

      function jie_cheng(num) {
        if (num === 1 || num === 0) {
          return 1;
        }
        return num * jie_cheng(num - 1);
      }

      for (let i = 100; i < 1000; i++) {
        const hundred = Math.floor(i / 100);
        const ten = Math.floor(i % 100 / 10);
        const x = i % 10;
        if (i === jie_cheng(hundred) + jie_cheng(ten) + jie_cheng(x)) {
          console.log(i);
        }
      }
    </script>
</head>
<body>
<h1>我的第一个HTML页面</h1>
<p>我的第一个段落。</p>
</body>
</html>
